package datastructure;
/**
 * Definition for singly-linked list.
 */
public class ListNode {
    public int val;
    public ListNode next;
    public ListNode() {};
    public ListNode(int val) { this.val = val; }
    public ListNode(int val, ListNode next) {this.val = val; this.next = next;}
    @Override
    public String toString() {
        return "ListNode [val=" + val + ", next=" + next + "]";
    }
}
